Anton Diabelli was an Austrian music publisher, editor and composer. Best known in his time as a publisher, he is most familiar today as the composer of the waltz on which Ludwig van Beethoven wrote his set of thirty-three Diabelli Variations.

Baron Henri Eduard Joseph de Lannoy, was a Flemish composer, teacher, conductor, and writer on music who spent most of his life in Austria. His compositions bridge the classical and early romantic styles. His full name and title in German was 'Heinrich Eduard Josef, Freiherr von Lannoy'.